Right now, the output includes this bit.
===
Global Options
-l, --rhlogin login OpenShift login
-p, --password password OpenShift password
-d, --debug Turn on debugging
--noprompt Suppress the interactive setup wizard from running before a command
--config FILE Path of a different config file
-h, --help Display help documentation
-v, --version Display version information
--timeout seconds Set the timeout in seconds for network commands
===
Going beyond this will probably be too problematic, since the message "invalid argument: --timeout test" is ultimately coming from Ruby's standard library, and there is no easy way to customize the message. We might be able to *guess* what arguments might have been passed, but I suspect it will lead to some unmaintainable error checking.
I'm marking this as WONTFIX.

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